Telephone system.



C. S. WINSTON.

TELEPHONE SYSTEM APPLICATION FILED JAN. 2, 1913.

Patented 0ct.13,1914.

27212-255555: EZ/EZZ'ZEZ'T /fl4 1135x1555 0252257022 MM L y I I EZZZ FZZE y.

fimgr lication I end uf in an answering bark Fwy R1 U1: mnnect H10 iinv. The i d 210F055 the from the hand ibsmiidn. The the upervisory 1 comm-1: U10 511M912- r ping P mmmon wag" I u V, Hinnis. have izwan E1311 rel magnetan inwnfakm b cm L (-irvuits 4.? and the t i To mn- 211111;; (117/ inventicn shm'n in N its so rann1panying(waving. a universal cm'al 1 operated cnvmt I? provided for intercumm-iil magnoin 5n stations, as A and G. and amp men battm'v sabstatzuns as G. mfenim:

:9 receiver the nurncse of iliusirmtimz M11 exchmge \VIU: :1 nu Y 1d 1 word vircm L 1 Ana} :0 Qm'l'enow Incl-P 111 (wt 0. m m" 111 n n manna posi- 1 and a fully 1 wzmmm 9 95. tusnid 1mm r0- mx-hringc in wmmm 25, l connect the operators set 0 to in uire the keys is fully depressed, operating the master contacts 8 and 9, the opening of contact 8 removing the shuntfrom the relay ROB.

When calling a magneto substation, the belli is rung steadily, and this ringing is obtained by fully depressing a he thus operating the master contacts, there y energizing the relay IR to connect ringing current to the magneto line.

Operation: Assuming now that a subscriber at the magneto substation A desires a connection with a common battery substation as G, the subscriber at Aoperates his hand generator thereby throwing drop 1 at the central ofiice. The 0 erator observing the signal inserts the p ug P into the jack J and throws the listening key LK to wants of the calling subscriber. T e sleeve of the jack J is dead having no connections with any apparatus and therefore none of the apparatus at the answerin end of the cord circuit is operated, thus caving drop CD in bridge of the calling line. The operator having received'the number and assuming that it is the substation G of the party line F, sh takes the plug P and tests as to the idle or busy condition of the wanted line. The test is made by touching the tip of the lug P to the sleeve of the ack J .If the ine is idle ground will be connected to the sleeve of the jack J from the cut-off relay C0 of the line circuit E. The sleeve being at ground potential the operator does not receive the customary busy click through her head receiver but if the line is busy and the ti? of the plug is placed on to the sleeve 0 the jack] J battery will be connected through the relay SC of another cord circuit through the sleeve contacts of the plug and -jack and through the cut-off relay to ground. This, raises the potential of the sleeve of jack Jl-and' when the tip touches the sleeve theopera'tor will receive the customary busy click, through her head receiver notifying her that the wanted line is busy. Assuming that the wanted line is idle, the operator insorts the plug P into the jack J closing an energizing circuit for the relay SC, relay SW and the cut-oil relay C0 of the line circuit E traced from battery through the relaySC, conductor '10, sleeve contacts of the plug P and jack J through the cut-ofi' relay CO to round energizing the two relays inscries. he. relay SW is also energized its circuit being traced frombattery through the relay .SWiaconductor 11, conductor 10,

sleeve contacts of the plug 1" and yacK J through the cutoff relay CO to round energizing the. relay SW Upon tie energization of the relay SC the supervisory lamp 3 is lighted from battery 37 through the lamp 3, conductor 12, alternate contact 13 of relay SC to round at normal contact 14; of relay SR lig ting the lamp 3, lamp 3 remaining li hted until the called subscriber answers. T e closing of alternate contact 13 also con nects ground from normal contact '14 in circuit with the winding of relay RCR and battery 15, but relay ROB does not energize due to the shunt circuit about its winding through its normal contact 19 and normal contact 8. The operator having plugged into the wanted line, and assuming that the bell of the desired subscriber is tuned to correspond to the frequency of the generator 9, the operator depresses the ringing key 4 fully, thereby also momentarily closing the master contacts 8 and 9. As soon as the pressure is released from the key l the master contacts are restored to normal, but contact 4 remains closed. As soon as the contacts 8 and 9 assume their alternate positions by reason of the key 4 beingfully depressed,

the normal contact of master contact 8 is opened removing the shunt from the relay RGR which is then energized from battery 15, through resistance 16, conductor 17,"

winding of relay RGR conductor 18, alternate contact 13 of relay SC to ground at normal contact 14 of relay SR energizing the said relay RCR which remains energized due ,to the opening of the shunt circuit through its normal contact 19. The relay R-CR upon energization closes the circuit throu h the interrupter rela IR traced from battery 37 through the interrupter I, alternate contact 20 of relay SC, conductor 21, the winding of rela IR, conductor 22, normal contact 9, con actor 23, alternate contact 19 of relay RCR, conductor 18, conductor 12', alternate contact 13 of relay SC to, ground at normal contact 14 of relay SR? energizing the relay 1B. The relay IR is now responsive to the interruptions of its circuit at interrupter I and due to the intermittent energizations of relay IR, the contact 24 of relay IR connects the generator 9 to the tip conductor '1, thus intermittently ringing the bell of the called for subscriber. The operator having now clos'edthe contact I and as soon as the relay IR is energized, a circuit for ringing current is established from the ungrounded pole of. generator 9, alternate contact 4:, normal contacts of ring ing contacts 5, (l, 7, conductor 25., alternate contact 24 of relay IR, tip conductor T to the tip contacts of the plug 1 and jack J line F including condenser and call bell of the substation G back over the ring contacts alternate contact. 26. -'lhe relay newperiodically connects *inging generator g to operates his: hand generator thereby throw the tip conductor T, of the cord circuit until mg the drop 1 at the central oflice. The opthe called subscriber answers. The contacts erator observing the signal inserts the plug 27, of the relay R'CR are held in their P into the jackJ and throws the listeningkey alternate position to keep the ringing cur- LK to connect the operators set 0 to the 7 rent from the answering end of the cord cirline to inquire the Wants of the calling subcuit so that it will not be heard by the call- I scriber. The sleeve or" the jack J is dead ing subscriber. When the called subscriber l ha ring no connections with any apparatus, answers, and when the relay IR is in its del and therefore none of the apparatus at the g energized condition, a circuit is closed l answering end of the cord circuit is opcr- 75 through the relay SR tracerfrom battery uted. Assuming now that the Wanted subthrough the lower winding 2.), conductor l scribe! is at the magneto substation M and 30, alternate contact 31 of relay Sil ,i that it is idle, Which it will be remembered was energized l l when the plug P was inserted in the jack J I the operator inserts the plug into the jack J and as the sleeve of the ack J is dead having no connection with $0 conductor 3:2, normal contact 26. the ring any apparatus therefore none of the appacontacts of the plug P and jack 1 through i rutus at the calling end of the cord circuit the substation back through the tip contacts I is operated, and drop CD remains in bridge of the jack J and the plug P normal couof the called line. To ring the magneto subgo tact- Ql, conductor 33, alternate contact 3% station M the operator presses any one of of relay SW conductor 35 to ground the four ringing contacts -11. 5, G or '7. The through the upper winding 36 of relay SR ringing key used is fully depressed into its c-nergiringthe said relay. The cnergizathird position closing its ringing contact tion of relay SR opens normal contact. ll and also th master o ta t 8 d 5), Th removing the ground and etiacing the superonly relay operated in the cord circuit D is isory lamp 3 notifying the operator that the interrupter relay IR and its circuit may the called subscriber has answered. The f be traced from battery 37, conductor 38, noropening of ground at contact ll of relay SR inal contact 20. conductor 21, the winding of urmature falling back subscribers also breaks the locking circuit for the relay RC1? which definergizes the suid breaking contact 19 opening the circuit of the relay ill restoring it to normal and thereby interrupting the ringing current. ture of the relay ROE falls back closing its normal contacts 27, tinuity of the talking conductors T and S. The subscribers are now connected in conthe heavily marked conductors. 'l i hen the have finished their conversation they restore their respective receivers to the switch-hooks. his hand generator, the current throwing the relay, its alternate The arinal restoring the con 1 I the master contacts to keep the crsutional circuit which may be traced over was the ringing contact 5 The subscriber at A operates relay IR, conductor 2-2. alternate contact conductor 39. normal contact 13 of relay SC, conductor to ground at normal contact 14 of relay SR energizing relay IR. Relay R closes its alternate contacts 94, 26 conncctinr ringing current from the actuated ringing contact in bridge of the called line. The operator keeps the actuated key in its fully depressed position so as to operate relay IRin u's QHEZ'f lZGd position. The ringing current can be traced from the ungrounded pole of the generator y assuming of course that it which was depressed. the alternate contact 5, the normally closed contacts 6 and T, conductor 25.

is clearing out drop CD and notifying the alternate contact 24, out over the line to'the operator that the subscriber at A has 1311- called subscriber. back to ground at alterished conversation. 'lhe operator then re- I] hate contact 2% thus steadily ringing the l l l l l the plug 1 from the jack J. The bell of the called substation. The operator iber at having replaced his receiver. may listen until the called subscriber an- *0 the circuit of relay SR is interrupted, de- 5 swers whereupon she releases the fully (10- euei ring said relay and lighting the superpressed ringing contact restoring! it to its risory lump 3 to notify the operator that the locking or indicating position, the master subs ribcr has replaced his receiver. The contacts restoring to their normal position operator they; disconnects the plug P from breaking the circuit of the relay IR- atal 55 jar-i; l removing ground from the relays tcrnate contact 9 The relay IR deinergiz- 0 t i T ..'/ing them and also deinc, its contacts :24 and 26 assume their northe cut-oil relay C0 of the line mal position establishing the continuity of circuit 12. the debuergilution of the relay SC I the talking conductors T and S. The subctiuc' the supei risorv lamp The cord l scribers are now in conversational circuit cc circuit l and the lines B and F having been 5 traced over the heavily marked conductors.

restored to normal. are now available for use 3 their the subscribers are through talkin x n in establishing other connections. they replace their receivers upon their i re- Assuming now that the subscriber at A l spective switch-hooks. The subscriber at A Wishes to converse 'ith the subscriber at l operates his hand generator, the currentmagneto substation M, the subscriber at A drop CD at the 3 throwing the clearing out central office notifying the operator that the calling subscriber has finished conversation. The subscriber M also operates the hand generator throwing the c caring out drop CD notifying the operator that the calledior subscriber is also through talking. The

' operator disconnects the plugs P and P plug P is inserted in a jack similar to J preventing the lamp 2 from lighting. When the subscriber replaces his receiver upon the switch-hook the relay SR decnergizes lighting the lamp 2 to notify the operator that the conversation has beenil finished. The plug P is then disconnected decnergizing the-relay SA and eifacing the lamp ,f;

While I'have shown a pluralit i gfbatter'ies and grounds in the circuit 0 m systern itwis to be understood that the; di erent batteries and grounds may be one and are, located-at the centraliofiice. [*Ido not wish to be limited to the exact structure as illustrated as many modifications and changes can be made by those skilled in the art wi hout departing from the spirit of the'invention, but-wish to claim all that which comes within the splrit and scope of the appended claims/ What I claim as new and desire tggc by United States Letter Patent 1s:

"1,.A telephone system comprising a ,uni-

- versal cord circuit adapted for interconnectingldificrcnt types of telephone lines, supervisory apparatus for said circuit, a ringing key or said cord circuit, automatic ringing apparatus for said cord circuit, manual ringing apparatus for said cord circuit, said key when actuated being adapted to connect manual or automatic ringingapparatus in operative relation with the cord circuit according to the type of line connected with.

2. A telephone system comprising a universal cord circuit adapted for interconnecting magneto and common battery telephone lines, supervisory ap mratus for said circuit, a ringing kcyior said cord circuit, automatic ringing apparatus, manual ringing apparatus, said key when actuated being adapted to connect either the manual or antomatic ringing apparatus in operative rela tion with the cord circuit according to whether the line connected with is magneto or common battery respectively,

3. A telephone system comprising a universal cord circuit adapted forv interconnecting different types of telephone lines, supervisor apparatus for said circuit, a ringing key or said cord circuit, automatic ringing apparatus, manual ringing apparatus, said key when actuated being adapted to coin nect the manual ringing apparatus and roll der the automatic ringing apparatus ineffective upon connection made with only one of the types of telephone lines.

4. A telephone system comprising a universal cord circuit adapted for interconnecting different typesof telephone lines, super visory apparatus for said circuit, a ringing key for said cordcircuit, automatic ringing apparatus, manual ringing apparatus, sai key when actuated being adapted to connect the automatic ringing apparatus and render the manual ringing apparatus inefiective upon connection made with only one of the types of'tele hone l nes.

5. A telep one system comprising a universal cord circuit adapted for interconnecting magneto and common battery telephone lines, supervisor apparatus for said circuit, a ringing 'key or said cord circuit, automatic ringing apparatus, manual ringing apparatus, said ke when actuated being adapted to connect t e manual-ringing apparatus and render the automatic ringing apparatus ineffective upon connection made with a magneto line circuit only.

6. A telephone system comprising a universal cord circuit adapted for interconnecting magneto and common battery telephone lines, supervisor apparatus for said circuit, a ringing key or said cord circuit, automatic ringing a paratus, manual ringing apparatus, said ey when actuated being a apted to connect the automatic ringing apparatus and render the manual ringing apparatus ineffective upon connection made.

and the other type of line renders the ringing apparatus manually controllable by the operator.

8. A telephone system comprising tale phone lines terminating in line vcircuits of different characters, a common sourcelofcurrent, one type of line clrcuit having its jack connected to a terminal of said source and.

the other type of line circuit having its jack on open circuit, a. universal cord circuit i01- mterconnecting such lines, supervisory a paratus for said cord, and ringing contro apparatus for said cord, circuit difl'erehtly operated according to the line-ccnmectedirrith Ali 0110 01 52154: ringing ammtzzins Conn- :31am;- mm H i A uzlivwml the npemi cause uutomatl for int and nmgnabf uppnm 22.5. v. V :1. (1nd cim'vnit. coniwy an?! apparatus or manual 50min of exfvvied acwrding to the,

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